YOU SAID:

The party was rocking to the core

INTO JAPANESE

パーティーは、コアに揺れていた

BACK INTO ENGLISH

The party was swinging core

INTO JAPANESE

パーティーはコアを振っていた

BACK INTO ENGLISH

The party was shaking the core

INTO JAPANESE

パーティーがコアを揺らしていた

BACK INTO ENGLISH

The party was shaking the core